Quiz: Boolean values

Select all examples with correct Boolean values in Raku

0	true
0	false
1	True	This is the only correct form for the True value.
1	False	This is the only correct form for the False value.
0	$True	This is a variable, not a Boolean literal.
0	$False	As well as this one.
0	TRUE
0	FALSE
0	1	This may be OK in a Boolean check, but this is not a Boolean value by itself.
0	0	This one too.
0	null	There is no such thing in Raku.

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